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In case anyone missed it, Ripstop By The Roll have a new wonder fabric, a 7×10 Denier Ripstop Nylon.
https://ripstopbytheroll.com/collections/membrane/products/0-56-oz-membrane-7-ripstop-nylon
0.56oz/sqyd
6.3 CFM
Downproof
C0 PFC Free DWR
Width 58″
Post if you get to try it!
Almost makes me want to jump back on the horse and make another quilt! Interesting they stayed with a 7d fabric. I know they were testing some 5d nylons a while back. Great time to be a MYOG’er.
PS – $19/yd a little hard to swallow.
Ryan
maybe 3 square yards in a quilt. 6 total for inner and outer fabric. 56 fabric would save 0.6 ounces compared to their 66 fabric. If I was making a quilt I might choose the 56 fabric.
I made a quilt, vest, and hood with the 66 membrane. They came out really good. Fairly fragile though, good for an inside layer, maybe not so good for an outer layer that gets subjected to abuse.
maybe 3 square yards in a quilt. 6 total for inner and outer fabric. 56 fabric would save 0.6 ounces compared to their 66 fabric.
Not sure that it’s worth spending $60 to save 0.6 ounces on a down quilt. That’s $100 per ounce saved, not to mention unknown material longevity. In comparison, moving from a silnylon tent ($300) to a DCF tent ($600) can save several ounces, around $40 – $50 per ounce saved.
Anyone seen any MYOG or cottage quilts made out of this yet?
Yeah, that price is getting close to DCF territory, and not worth the extra over the .66 stuff. For me. It’s pretty far past the point of diminishing returns.
A few years ago I did a weight-saved vs cost survey.
Pick any item of gear and find the cheapest option that meets your feature/quality needs. Then find lighter options compare the price.
I arrived a the range of $6 – $12 extra for every ounce saved ($100 – $200 per pound). This worked for just about everything with the exception of sleeping bags (likely due to the cost of higher fill powers). Cuben / DCF is way off the top of the chart. As noted, so is Membrane 7.
It’s easy to spend $20 on a yard for a small project, but then the weight savings will be so small as to be irrelevant.
I bought a couple yards of the stuff on sale when it first came out. Used it in a MYOG bivy. Very nice fabric, seems like it is more breathable than their Membrane 10.
I might use it in a MYOG quilt, going with 5 yards in all black (if they ever stock it again). My logic is that if I’m spending the time to design, sew, and stuff my own quilt, then I might as well make it unique and the lightest I can. I do really like their Membrane 10 fabric though, so I might just go with it as a “known good” choice.
It appears that all of RBTR’s sub one oz breathable nylons are calendered, meaning that one side of the fabric is run over a hot roller, melting the fibers to a shiny finish on that side. The concern is that the melting may reduce the vapor permeability of the material, a problem for a sleeping bag or quilt that needs to breath to keep you dry, regardless of whether the calendered side is on the inside.
Several years ago, a BPL member who is now in the gear business sponsored a joint purchase of a .66 oz fabric that was not calendered. About half of it was repurchased by another member, but still have the other half, and that would be my choice for a bag or quilt. Just enough left for that.
I don’t think a lightweight non-calendered fabric would work well for a down quilt. Too much down loss. Membrane 10 works well for me in my quilt – no issues.
A non-calendered light fabric would be nice for a synthetic quilt though.
Several years ago, a BPL member who is now in the gear business sponsored a joint purchase of a .66 oz fabric that was not calendered. About half of it was repurchased by another member, but still have the other half, and that would be my choice for a bag or quilt. Just enough left for that.
So, are you going to share it? :)
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